src/glut/mini/bitmap.c

/* Copyright (c) Mark J. Kilgard, 1994. */

/* This program is freely distributable without licensing fees
   and is provided without guarantee or warrantee expressed or
   implied. This program is -not- in the public domain. */

#include "glutbitmap.h"

void APIENTRY 
glutBitmapCharacter(GLUTbitmapFont font, int c)
{
  const BitmapCharRec *ch;
  BitmapFontPtr fontinfo;
  GLfloat swapbytes, lsbfirst, rowlength;
  GLfloat skiprows, skippixels, alignment;

#if defined(_WIN32)
  fontinfo = (BitmapFontPtr) __glutFont(font);
#else
  fontinfo = (BitmapFontPtr) font;
#endif

  if (c < fontinfo->first ||
    c >= fontinfo->first + fontinfo->num_chars)
    return;
  ch = fontinfo->ch[c - fontinfo->first];
  if (ch) {
    /* Save current modes. */
/*     glGetFloatv(GL_UNPACK_SWAP_BYTES, &swapbytes); */
/*     glGetFloatv(GL_UNPACK_LSB_FIRST, &lsbfirst); */
/*     glGetFloatv(GL_UNPACK_ROW_LENGTH, &rowlength); */
/*     glGetFloatv(GL_UNPACK_SKIP_ROWS, &skiprows); */
/*     glGetFloatv(GL_UNPACK_SKIP_PIXELS, &skippixels); */
       glGetFloatv(GL_UNPACK_ALIGNMENT, &alignment); 
    /* Little endian machines (DEC Alpha for example) could
       benefit from setting GL_UNPACK_LSB_FIRST to GL_TRUE
       instead of GL_FALSE, but this would require changing the
       generated bitmaps too. */
/*     glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE); */
/*     glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE); */
/*     glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); */
/*     glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); */
/*     glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); */
     glPixelStorei(GL_UNPACK_ALIGNMENT, 1); 
    glBitmap(ch->width, ch->height, ch->xorig, ch->yorig,
      ch->advance, 0, ch->bitmap);
    /* Restore saved modes. */
/*     glPixelStorei(GL_UNPACK_SWAP_BYTES, swapbytes); */
/*     glPixelStorei(GL_UNPACK_LSB_FIRST, (int)lsbfirst); */
/*     glPixelStorei(GL_UNPACK_ROW_LENGTH, (int)rowlength); */
/*     glPixelStorei(GL_UNPACK_SKIP_ROWS, skiprows); */
/*     glPixelStorei(GL_UNPACK_SKIP_PIXELS, skippixels); */
     glPixelStorei(GL_UNPACK_ALIGNMENT, (int)alignment); 
  }
}